diff --git a/pkg/api/api.go b/pkg/api/api.go
index ef680fd3ea5..bd9fdbac2da 100644
--- a/pkg/api/api.go
+++ b/pkg/api/api.go
@@ -797,7 +797,7 @@ func (p *putterSessionWrapper) Done(ref swarm.Address) error {
 }
 
 func (p *putterSessionWrapper) Cleanup() error {
-	return errors.Join(p.PutterSession.Cleanup(), p.save())
+	return p.PutterSession.Cleanup()
 }
 
 func (s *Service) getStamper(batchID []byte) (postage.Stamper, func() error, error) {
diff --git a/pkg/api/stewardship.go b/pkg/api/stewardship.go
index fe1beb34e48..e617549d88f 100644
--- a/pkg/api/stewardship.go
+++ b/pkg/api/stewardship.go
@@ -70,7 +70,6 @@ func (s *Service) stewardshipPutHandler(w http.ResponseWriter, r *http.Request)
 
 	err = s.steward.Reupload(r.Context(), paths.Address, stamper)
 	if err != nil {
-		err = errors.Join(err, save())
 		logger.Debug("re-upload failed", "chunk_address", paths.Address, "error", err)
 		logger.Error(nil, "re-upload failed")
 		jsonhttp.InternalServerError(w, "re-upload failed")
diff --git a/pkg/statestore/storeadapter/migration.go b/pkg/statestore/storeadapter/migration.go
index 52eceaf4335..171f31ccf57 100644
--- a/pkg/statestore/storeadapter/migration.go
+++ b/pkg/statestore/storeadapter/migration.go
@@ -19,6 +19,7 @@ func allSteps() migration.Steps {
 		4: deletePrefix("blocklist"),
 		5: deletePrefix("batchstore"),
 		6: deletePrefix("sync_interval"),
+		7: deletePrefix("sync_interval"),
 	}
 }
 
diff --git a/pkg/storageincentives/proof_test.go b/pkg/storageincentives/proof_test.go
index 9ee3745e1af..860f46022f5 100644
--- a/pkg/storageincentives/proof_test.go
+++ b/pkg/storageincentives/proof_test.go
@@ -43,7 +43,7 @@ var testData []byte
 
 // Test asserts that MakeInclusionProofs will generate the same
 // output for given sample.
-func TestMakeInclusionProofsRegression(t *testing.T) {
+func TestMakeInclusionProofsRegression_FLAKY(t *testing.T) {
 	t.Parallel()
 
 	const sampleSize = 16
diff --git a/pkg/storer/internal/reserve/reserve.go b/pkg/storer/internal/reserve/reserve.go
index 04f5219715c..47c843e48b1 100644
--- a/pkg/storer/internal/reserve/reserve.go
+++ b/pkg/storer/internal/reserve/reserve.go
@@ -118,17 +118,11 @@ func (r *Reserve) Put(ctx context.Context, store internal.Storage, chunk swarm.C
 
 	newStampIndex := true
 
-	switch item, loaded, err := stampindex.LoadOrStore(
-		indexStore,
-		storeBatch,
-		reserveNamespace,
-		chunk,
-	); {
-	case err != nil:
+	item, loaded, err := stampindex.LoadOrStore(indexStore, storeBatch, reserveNamespace, chunk)
+	if err != nil {
 		return false, fmt.Errorf("load or store stamp index for chunk %v has fail: %w", chunk, err)
-	case loaded && item.ChunkIsImmutable:
-		return false, fmt.Errorf("batch %s index %s: %w", hex.EncodeToString(chunk.Stamp().BatchID()), hex.EncodeToString(chunk.Stamp().Index()), storage.ErrOverwriteOfImmutableBatch)
-	case loaded && !item.ChunkIsImmutable:
+	}
+	if loaded {
 		prev := binary.BigEndian.Uint64(item.StampTimestamp)
 		curr := binary.BigEndian.Uint64(chunk.Stamp().Timestamp())
 		if prev >= curr {